Well, I had the same problem you are experiencing. I love the web interface, as it makes the distrabution so much easier. However, you cannot copy files to and from the ActiveX program, or with the Terminal Services Advanced Client. You can use the original client that ships with Windows 2000, but you loose the higher encryption that you get with the TSAC version. I have heard that you only have 1 option, and that is to implement a third-party solution or create one yourself. I have alos heard that Microsoft plans to update the TSAC version, but I cannot get a straight answer from them. If you hear of anything or if you come up with a solution, could you PM me?
Thanks.